sigamp measures either baseline-corrected
RMS amplitudes or (for suitably annotated ECG signals) normal QRS peak-to-peak
amplitudes for all signals of the specified record. It makes up to 300
measurements (but see -n below) for each signal and calculates trimmed means
(by discarding the largest and smallest 5% of the measurements and taking
the mean of the remaining 90%).

Read the signal files
in high-resolution mode (default: standard mode). These modes are identical
for ordinary records. For multifrequency records, the standard decimation
of oversampled signals to the frame rate is suppressed in high-resolution
mode (rather, all other signals are resampled at the highest sampling frequency).

-nnmax

Make up to nmax measurements on each signal (default: 300).

-p

Print
results in physical units (default: ADC units). -p may be followed by a single
character to specifify a time format (used with -q and -v when printing individual
measurements); choices are -pd (time of day and date if known), -pe (elapsed
time in hours, minutes, and seconds), -ph (elapsed time in hours), -pm (elapsed
time in minutes), -ps (elapsed time in seconds (default)), -pS (elapsed time
in sample intervals).